Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / therm / fanpwm.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c
new file mode 100644 (file)
index 0000000..bde5cea
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ *         Martin Peres
+ */
+#include "priv.h"
+
+#include <core/device.h>
+#include <core/option.h>
+#include <subdev/bios.h>
+#include <subdev/bios/fan.h>
+#include <subdev/gpio.h>
+
+struct nvkm_fanpwm_priv {
+       struct nvkm_fan base;
+       struct dcb_gpio_func func;
+};
+
+static int
+nvkm_fanpwm_get(struct nvkm_therm *therm)
+{
+       struct nvkm_therm_priv *tpriv = (void *)therm;
+       struct nvkm_fanpwm_priv *priv = (void *)tpriv->fan;
+       struct nvkm_gpio *gpio = nvkm_gpio(therm);
+       int card_type = nv_device(therm)->card_type;
+       u32 divs, duty;
+       int ret;
+
+       ret = therm->pwm_get(therm, priv->func.line, &divs, &duty);
+       if (ret == 0 && divs) {
+               divs = max(divs, duty);
+               if (card_type <= NV_40 || (priv->func.log[0] & 1))
+                       duty = divs - duty;
+               return (duty * 100) / divs;
+       }
+
+       return gpio->get(gpio, 0, priv->func.func, priv->func.line) * 100;
+}
+
+static int
+nvkm_fanpwm_set(struct nvkm_therm *therm, int percent)
+{
+       struct nvkm_therm_priv *tpriv = (void *)therm;
+       struct nvkm_fanpwm_priv *priv = (void *)tpriv->fan;
+       int card_type = nv_device(therm)->card_type;
+       u32 divs, duty;
+       int ret;
+
+       divs = priv->base.perf.pwm_divisor;
+       if (priv->base.bios.pwm_freq) {
+               divs = 1;
+               if (therm->pwm_clock)
+                       divs = therm->pwm_clock(therm, priv->func.line);
+               divs /= priv->base.bios.pwm_freq;
+       }
+
+       duty = ((divs * percent) + 99) / 100;
+       if (card_type <= NV_40 || (priv->func.log[0] & 1))
+               duty = divs - duty;
+
+       ret = therm->pwm_set(therm, priv->func.line, divs, duty);
+       if (ret == 0)
+               ret = therm->pwm_ctrl(therm, priv->func.line, true);
+       return ret;
+}
+
+int
+nvkm_fanpwm_create(struct nvkm_therm *therm, struct dcb_gpio_func *func)
+{
+       struct nvkm_device *device = nv_device(therm);
+       struct nvkm_therm_priv *tpriv = (void *)therm;
+       struct nvkm_bios *bios = nvkm_bios(therm);
+       struct nvkm_fanpwm_priv *priv;
+       struct nvbios_therm_fan fan;
+       u32 divs, duty;
+
+       nvbios_fan_parse(bios, &fan);
+
+       if (!nvkm_boolopt(device->cfgopt, "NvFanPWM", func->param) ||
+           !therm->pwm_ctrl || fan.type == NVBIOS_THERM_FAN_TOGGLE ||
+            therm->pwm_get(therm, func->line, &divs, &duty) == -ENODEV)
+               return -ENODEV;
+
+       priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+       tpriv->fan = &priv->base;
+       if (!priv)
+               return -ENOMEM;
+
+       priv->base.type = "PWM";
+       priv->base.get = nvkm_fanpwm_get;
+       priv->base.set = nvkm_fanpwm_set;
+       priv->func = *func;
+       return 0;
+}